杏北低渗透油藏应力敏感性评价

Stress Sensitivity Evaluation of Xingbei Low Permeability Reservoir

通过对大庆外围低渗透岩样的应力敏感性实验数据分析发现,低渗透率油层应力敏感性受储层本身渗透率和有效应力影响较大,应用乘幂关系可较好地拟合渗透率与有效压力关系。根据实验分析推导出受应力敏感性影响下的渗透率与井底压力关系式、油井产量与井底压力关系式,绘制了杏北低渗透油层应力敏感性曲线。通过数值模拟研究超前注水技术开发低渗透油藏的效果并优化相关技术指标。

Through the analysis of stress sensitivity data of low permeability rock samples in the periphery of Daqing, it is found that the stress sensitivity of low permeability oil layer is greatly affected by permeability and effective stress, and the power relation can be used to better fit the relationship between permeability and effective pressure. According to the experimental analysis, the relationship between permeability and bottomhole pressure, oil well production and bottomhole pressure under the influence of stress sensitivity is derived, and the corresponding stress sensitivity map of low permeability reservoir in Daqing is drawn. Through numerical simulation, the effect of advanced water injection technology on the development of low permeability reservoirs was studied and relevant technical indicators were optimized.